Study of Crystal Growth of Zinc Selenide and the Low Temperature Emission Spectra of Undoped and Monovalent Metal Doped Melt Grown Zinc Selenide.

摘要

Recently there has been an increased interest in zinc selenide because of its possible application in the laser window problem. A better understanding of the defect structure of this material is to be desired. It is the purpose of this investigation to expand the study of the effects of native defects and residual impurities in zinc selenide on the emission spectra and through this study to obtain a better understanding of the nature and structure of the active centers formed from them and of their effects on the optical absorption in the spectral regions of interest to the Air Force. Melt grown crystals of zinc selenide, undoped and doped with sodium, lithium, sodium chloride, lithium chloride, and silver, were studied. The undoped crystals showed predominantly the I sub 1 deep series of lines believed to arise from the decay of an exciton bound to an acceptor. The sodium doped crystals showed predominantly the I sub 1 super Y exciton line believed to be associated with a sodium acceptor; the lithium doped crystals showed the I sub 1 super X line, believed to be associated with a lithium acceptor; the silver doped crystal showed lines not previously seen.